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Alcohols Phenols Ethers

Solution for Class 12, Chemistry, Alcohols Phenols Ethers

Question 1

The best method to prepare 3-methylbutan-2-ol from 3-methylbut-1-ene is

addition of water in presence of dil. $H_{2} SO_{4}$
addition of $HCl$ followed by reaction with dil. NaOH
hydroboration - oxidation reaction
Reimer-Tiemann reaction.

Topic:

Alcohols, Phenols & Ethers

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Question 2

RAVI KUMARS/O SURESH PRASAD [Form No MMD.. QNo. 10 A field in which the work is done in a moving body along a closed path is zero is called

Electric field
Conservative field
Electromagnetic field
None of the above

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Alcohols, Phenols & Ethers

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Question 3

Select Response QNo. 12 if

y = lo g (2 x)

then

d y / d x =

zero
$1/ x$
$x$

Topic:

Alcohols, Phenols & Ethers

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Question 4

mis reaclifer is inocon an cactitermanu reach readran. (11) Riemmer Tiemaun reaction. Whar phomol is reacted witle chlovolon iu te presence of aciueou pol hydrom Hin o-hydroxy beuraldely de 0 r

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Question 5

(d) Alcohoes are weaker acids than water but stronger acids than Acetylene.

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Question 6

(42.) An isomer of ethanol is -

Methanol
Dimethyl ether
Acetone
Diethyl ether

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Question 7

Hydrated

ZnCl_{2}

and Conc.

HCl

Rectified spirit contains-

$95.5%$ Alcohol
$75%$ Alcohol
$100%$ Alcohol

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Question 8

Which of the following is formed when a mixture of Calcium formate and Calcium acetate is heated?

Methanol
Ethanol
Acetic acid
Ethanal

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Question 9

Which of the following compounds doesn't contain a carboxyl group?

Methanoic acid
Ethanoic acid
Picric acid
Benzoic acid

Topic:

Alcohols, Phenols & Ethers

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Question 10

Which of the following is functional isomer of monocarboxylic acid?

Ester (B) Alcohol
Ether
Aldehyde

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Alcohols, Phenols & Ethers

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Question 11

By which of the following reagents, formic acid and formladehyde can be distinguished?

Benedict's solution
Tollen's reagent
Fehling's solution
$NaHCO_{3}$

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Alcohols, Phenols & Ethers

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Question 12

Which of the following is pacamagnetic ?

Wrools
$[N i (CN)]^{2 -}$
INiC1, $^{2} -$
$∣$ CoiNH $_{3} ∣_{6} ∣^{3 +}$

Topic:

Alcohols, Phenols & Ethers

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Question 13

निम्नीरिखित में किस जेज अपु का

M_{5}

एक प्रमुख संघटक है ?

सोमोतलीकिस

Topic:

Alcohols, Phenols & Ethers

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Question 14

Magniesium is an importatn eomponent of whych biomolecule?

Hacmoglobin
Ctıorophyll
Plorigen
ATP

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Alcohols, Phenols & Ethers

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Question 15

Assign the structure of major product

(X)

of the reaction given below.

Topic:

Alcohols, Phenols & Ethers

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Question 16

Ethylene oxide when reacted with Grignard's reagent yields

primary alcohol
secondary alcohol
tertiary alcohol
cyclopropyl alcohol.

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Alcohols, Phenols & Ethers

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Question 17

Benazaldehyde to

α

-Hydroxyphenylacetic acid (ix) Benzole acid to m- Nitrobenzyl alcohol 12.16 Describe the following:

Acetylation
Cannizzaro reaction
Cross aldol condensation
Decarboxylation

Topic:

Alcohols, Phenols & Ethers

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Question 18

5.

⟶ NaOH, H, O

Product Product is obtained in the above reaction is : (Principal component of coconut oii) (several hours)

$R - CO_{2} Na$ ::
RCHO
None of these

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Question 19

Baldraw the structures of all isomeric alcohols of molecular formula

C_{5} H_{12} O

and give their

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Question 20

(ii) By hydroboration-oxidation: Diborane

(BH_{3})_{2}

reacts with alkenes to give trialkyl boranes as addition product. This is oxidised to alcohol by hydrogen peroxide in the presence of aqueous sodium hydroxide. The addition of borane to the double bond takes place in such a manner that the boron atom gets attached to the

s p^{2}

carbon carrying greater number of hydrogen atoms. The alcohol so formed looks as if it has been formed by the addition of water to the alkene in a way opposite to the Markovnikov's rule. In this reaction. alcohol is obtained in excellent yield.

Topic:

Alcohols, Phenols & Ethers

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Solution for Class 12, Chemistry, Alcohols Phenols Ethers

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